Carburetor



C. A. NORLANDER.

CARBURETOR.

APPLICATlON FILED MAY 9, 192].

1,433,579. nted July 25, 1922.

2 SHEETSSHEET I.

c. A, NORLANDER.

CARBURETOR.

APPLICATION FILED MAY 9, I921 1,%ZQ3S,579. Patented July 25, 1922.

2 SHEETS-SHEET 2.

PATENT orator CHARLESLA. NORLA-NDER, OF: GREENVILLE, ILLINOIS; ASSIGNOR 0F ONE-HALF TO CHARLES; E. DAVIDSON, OF GREENVILLE, ILLINOIS.

CARIBURETOR.

Specifioationbf lettersi'atent.

Patented July V5, 1922'.

Application filed May 9, 1921; Serial not 467,867. I

To all whom, 2'25 may concern:

' Be it known that I, CHARLES A. Non- LANDER, a citizen or, the United States, residing at tireenville, in the county of Bond and State of Illinois, have invented a new and useful Carburetor, ofwhich the following is a specification.

This invention relates to carburetors especially designed for useqin connection with natural or artificialgas as a fuel.

tine otthe objectsof the invention is to provide a device oi this character which will automatically regulate they supply of fuel to the engine, the construction of the carburetor being such that gas will be thoroughly mixed with air in proper proportions.

Another object isto provide means whereby the amount of fuel admitted to the en gine willv dependuppn the suction of the engine so that the proper amount of fuel will be mixed with-the air to produce the proper explosive mixture. e

A still. further objectis to provide means whereby the supply of. gas is automatically cut .oil when the engine is not. in operation, thus preventing leakage.

A still further ob 'ect is to provide a carburetor ol this; type particularly designed for use in COIlIlGi'gtiOitWith a throttling governor whereby the supply of fuel to the, en gine will be automatically cont'rolled.

With the tl oregolng and other ob ects in View which. will. appear as the description proceeds, the invention resides in the combination. and arrangement of parts and in the details o'l construction hereinafter described andclaimed, it being understood that, within the scope or what is claimed, changes in the precise embodiment of the invention shown. can be made without departing from the spirit of the invention In the accompanying drawings the pre 'ferred formoftheinvention has been shown.

In said drawings Figure l is a side elevation oi? the carburetor.- p a Figure 2 is a'verticalsection therethrough. Figure 3 is a section on line 3-3, Fi 'ure l. Figure at is a perspective View of the adjustable air tube. p I

Figure 5 is an elevation of the inner gas tube.

Referring to the figures by characters of reference 1 designates the lower member of the body or the carburetor, the same being providedwith an enlarged upper end tube 2 counterbored as indicated at3 to provide a seat. An interiorly threaded extension 4 is provided on the side of this lower section 1 and is designed to be engaged by the air supply pipe 5. The lower end ofthe section 1 is closed by a plug 6 which can be connected to the section 1 in any manner desired and .has a central opening 7 there tliroughcons tituting a continuation of the space within an outer gas tube 8 which is integral with. and ext-ends upwardly from the plug 6. A tubular extension 9 projects (lownwardly from theplug andhas its lower end portion provided with both interior and exterior screw threads as shown at 10. Openings-11' are formed in this extension 9 and communicate with the interior of. a supplementalcasing 1.2-wl1ich is fitted snugly on the extension 9 and provides an annular gas chamber 13 with which the openings 11 communicate.- An inlet tube 14 is formed with and extends radially from the wall of the casing 12 and. is adapted to be connected to a gas supply tube or pipe 15.

.i'ninner-gasrtube 16 is insertible into the opening 7 in the plug 6 and has its lower end extendingdownwardly within the space surrounded by the extension 9 and exteriorly screw threadfed,.as atf1j7, so to engage the interior screw threads-on the lower end 10 of the extension 9. The lower end of this inner tube 16" is solid and is zulapted to be engaged by a packing nut-l8. Another nut 19 engages the exterior threads on the lower end portion 10 of the extension 9 and corn stitutes a lock nut for hearing against the bottom of the casing 12. Packing, indicated. at 20, is interposed. between the two nuts 18 and 19 so as to seal the joint between the extension 9 and the threaded portion of the inner gas tube 16. An angular head 21 may be formed on the lower end of: the inner tube 16 whereby said tube can be readily screwed into or out of position by the use of an ordinary wrench. Radial openings 22 areprovided in the inner tube 16 and comterminates below the upper end ofthe tube 8 and has its exterior diameter reduced, this reduced portion being slotted longitudinally as shown at 23.

Firmly seated in the counterbore 3 is a bearing ring 24 which projects beyond the upper end of the section 1 and is provided with an annular groove 25. In this ring is adjustably mounted a flared tube or rin 26 from which depends an arm 27 engage by a clamping screw 28. This screw extends through a longitudinal slot 29 in the section 1 of the casing and it will be obvious that by loosening the screw the flared tube can be adjusted upwardl or downwardly and then fastened. it wil be noted that the passage within the flared tube decreases in diameter toward the lower end thereof and that the lower end of this passage is normally slightly above the upper end of the gas tube 8.

Mounted for rotation on the bearing ring 24 is the upper section 30 of the carburetor casing, the lower open end of this section being counterbored so as to fit snugly on the projecting portion of the ring 24 and being held to said ring by a key or pin 31 which rests within the groove 25 but is ca pable of sliding within the groove during the rotation of the section 30 upon the ring 24. This upper section 30 is closed at its upper end except for a threaded bore 32 in which is mounted a threaded tube 33 having a head 34 at its upper end. This tube constitutes a uide for a stem 35 to the lower end of which is connected a disk or diaphragm 36 mounted within the flared tube and s aced therefrom. A central boss 37 is provided upon the lower face of the disk or diaphragm 36 and carries a washer or valve 38 of leather or the like adapted to contact with the upper end of the tube 8 A conical deflector extends downwardly from the lower face of the washer, as shown at 39 and depending from the center of this deflector is a fuel pin 40 which is slidable within the slotted portion of the tube 16 and has an enlarged lower end portion 41 which fits snugly within the tube. A spring 42 is mounted on the stem 35 and bears at its lower end against the diaphragm or disk 36 and at its upper end a ainst the tube 33. Thus the washer 38 is he d normally pressed against the tube 8, the tension of the spring 42 being regulated readily by adjusting the tube 33. A lock nut 43 is mounted on the tube 33 and normally bears against the upper end of the section 30 so as to secure the tube against movement.

A fuel outlet pipe 44 extends radially from the section 30 and contains a butterfly valve 45 mounted on a stem 46. This stem is mounted for rotation and has a radial arm 47 at one end especially adapted to be connected to a suitable governor whereby, as the speed of the engine increases the arm 47 will be shifted so as to partly or entirely close the outlet tube 44 at the valve 45. The movement of the arm 47 can be limited by a stop screw 48 carried by an arm 49 extending from the section 30.

Assuming that the butterfly valve 45 is open and that the engine is in operation, it will be apparent that each suction stroke of the engine will cause air to. be drawn through the pipe 5 and thence through the flared tube 26, the force of the air being suflicient to lift the disk or dis. hragm 36 against the spring 42 so as there y to raise the washer 38 ofl of the end of the tube 8. Consequently a suction will be set up through the tube 8 from the interior of the tube 16 so that gas will be sucked from the pipe 15 through the openings 11 into the openings 22 and tube 16 and thence through the slots 23 in the outer tube 8. When the diaphragm 36 is raised the in 40 is also raised so that the amount of gas escaping through the slots 23 is thus controlled, this amount varying in proportion to the amount of movement of the diaphragm 36. When the engine is not in operation the spring 42 will hold the washer 38 pressed against the tube 8 so as to prevent leakage of gas.

By mounting the section 30 so as to swivel on the section 1, the carburetor can be adjusted for ready connection to en ines of different types. It will be noted a so that the casing 12 can be adjusted angularly by loosening the nut 19.

What is claimed is 1. In a carburetor the combination with a casing having an air inlet and a fuel outlet, of a diaphragm in the path of the air passing from the inlet to the outlet, a gas conductingtube within the casing, means movable with the diaphragm and normally engaging the end of the tube to close the gas outlet of the tube, an inner gas conducting tube having an outlet. and means within the inner as conducting tube and movable with the diaphragm for regulating the flow of gas from the inner tube to the outer tube.

2. In a carburetor the combination with a casing having an air inlet and a fuel outlet and a flared tube adjustably mounted between said inlet and outlet, of a gas tube, a yieldingly restrained diaphragm movably mounted within the flared tube, and a valve movable with the diaphragm and normally closing the outlet end of the gas tube, an inner tube within the gas tube having a gas inlet and a longitudinal outlet, and means within the inner tube and movable with the valve and diaphragm for controlling the flow of gas from the inner to the outer tube when the valve is unseated.

In a carburetor the combination with a casing having an'air inlet and a fuel outlet and a flaredtube adjustably mounted between said inlet and outlet, of a gas tube, a

yieldingly restrained diaphragm movably mounted within the flared tube, and a valve movable with the diaphragm and normally closing the outlet end of the gas tube, an inner tube within the gas tube and having a gas inlet and a longitudinal gas outlet, and means movable with the diaphragm and valve for regulating the flow of gas from the inner to the outer tube during the movement of the valve oif of its seat and in proportion to the amount of such movement.

4. In a carburetor the combination with a casing having an air inlet and a fuel outlet, of a gas tube opening into the casing, a diaphragm movably mounted in the casing between the inlet and outlet, adjustable means for yieldingly holding the diaphragm against movement, a valve movable with the diaphragm and normally seated on the gas tube to close the outlet end of the tube, and means movable with the valve and within the gas tube for controlling the flow of gas from the tube when the valve is unseated.

5. In a carburetor the combination with a casing having an air inlet and a fuel outlot, of a gas tube opening into the casing, a diaphragm movably mounted in the casing between the inlet and outlet, adjustable means for yieldingly holding the diaphragm against movement, a valve movable with the diaphragm and normally seated on the gas tube to close the outlet end of the tube, and

.means movable with the valve and within the gas tube for controlling the flow of gas from the tube when the valve is unseated, the amount of gas released increasing in proportion to the extent of movement of the valve away from its seat, and means movable with the valve for deflecting the escaping gas to effect a thorough mixing thereof with the air in the cam'ng.

6. In a carburetor the combination with a casing having an air inlet and a fuel outlet, of a tube projecting into the casing for de livering gas into the current of air passing from the inlet to the outlet, an inner tube within said tube and having a gas inlet and a longitudinal gas outlet, a diaphragm movably mounted in the casing, a valve movable therewith, yieldin means for resisting the movement of the diaphragm and for holding the valve normally seated upon the outlet oi. the outer tube, a pin movable with the valve and within the tube for controlling the flow of gas through the longitudinal outlet in the inner tube.

I11 testimony that I claim the foregoing as my own, I have hereto affixed my signature in the presence of two witnesses.

CHAS. E. DAVIDSON, EMMA B. LEIDEL. 

